The thing is, people judge (non-fiction) books by their width. They'd rather pay a significant amount of money for a merely useful 300 pages book than for a lif

The thing is, people judge (non-fiction) books by their width. They'd rather pay a significant amount of money for a merely useful 300 pages book than for a life-changing 10 pages booklet. So, as you say, turn your 10 pages booklet into a 300 pages book with lots of repetition, examples, pictures and testimonials, and buyers will be happy.